Callophrys dumetorum
In 3 days ~20% in a week ~40%
Callophrys dumetorum, the bramble hairstreak or lotus hairstreak, is a butterfly of the family Lycaenidae. It is found in the United States in coastal California and rarely in inland California. Subspecies C. d. oregonensis is known as the Oregon green hairstreak.
Callophrys dumetorum has a wingspan is 25–32 mm. The wings are light brown dorsally, and vivid green ventrally, with a broken white postmedial line. On the forewing, the green is typically limited to the leading 1/3rd of the wing.
These butterflies can be found in heathlands, road-cuts, coastal dunes, and open sites and clearings in Douglas-fir and ponderosa pine forests. The larvae have been recorded on broad-leafed lotus and Acmispon nevadensis Adults feed on nectar from these plants, as well as from desert parsley, dogbane, yerba santa, California buckeye, and woolly sunflower.
In 1998 Emmet et al. identified the lectotype for C. dumetorum as the Coastal Green Hairstreak (Callophrys viridis). This disagreement over the identity of the lectotype of C. dumetorum led to confusion between C. dumetorum, C. sheridanii, and C. viridis. The binomial name... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States | |
| 2 | Joshua Tree National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Diego | 🇺🇸 United States | |
| 2 | Los Angeles | 🇺🇸 United States | |
| 3 | San Francisco | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Lotus Hairstreak sighting in Channel Islands National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 102nd most-seen of the 131 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
March
In that month about 20% of wildlife watchers report a Lotus Hairstreak in Channel Islands National Park on a given day, against under 5% in May to February, the lowest months. That is one of Channel Islands National Park's wettest months, with about 60 mm of rain against almost none in July.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Lotus Hairstreak sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Lotus Hairstreak sightings, Channel Islands National Park has the highest daily chance: about 10%. Next come Joshua Tree National Park (United States, under 5%).
Same family: Lycaenidae
The closest relatives of the Lotus Hairstreak that you can see in Channel Islands National Park (family Lycaenidae, Gossamer-winged Butterflies) are Gray Hairstreak (about 20%), Marine Blue (about 20%) and Elkalyce amyntula (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Lotus Hairstreak is recorded against all the insects logged in Channel Islands National Park (6 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
